- In an attempt to increase the reliability of the TOF-Watch accelerometer a preload device was introduced. According to Claudius, Viby-Mogensen (2008), there is insufficient evidence to confirm or deny that the application of a preload will increase the precision of acceleromyography.
- The preload device attempts to restrict the movement of the thumb to one dimension. With a three dimensional accelerometer, this is not necessary.
Claudius, C., Viby-Mogensen, J., 2008. ‘Acceleromyography for Use in Scientific and Clinical Practice – A Systematic Review of the Evidence’. Anesthesiology; 108:1117-40